Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2007.05a
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- Pages.1191-1195
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- 2007
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- 1598-2548(pISSN)
Approximation Models for Structure-External Acoustic Interaction
외부 음향과 구조의 연동 현상 고려한 근사 모델
- Lee, Moon-Seok (KAIST Mechanical Engineering Novic) ;
- Park, Youn-Sik (KAIST Mechanical Engineering Novic) ;
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Park, Young-Jin
(KAIST Mechanical Engineering Novic) ;
- Park, K.C. (University of Colorado, Dept of Aerospace)
- Published : 2007.05.10
Abstract
Many approximate models for interaction between a flexible structure and an infinite external acoustic medium have been developed for a long time. Among them, Doubly Asymptotic Approximations (DAAs) are very well known approximations. But, it has shortcomings in intermediate frequency range and can't fully describe the acoustic medium. So, this paper presents the modified approximation by applying the retarded and advanced potentials to Kirchhoff's formula. It describes the external acoustic medium more in detail and shows a good result in early time transient responses when it was applied to a spherical shell. Through a spherical shell interacting with external acoustic medium, the transient responses for the proposed model is compared to Huang's exact solution and DAA2.